A river of northwest European U.S.S.R. flowing about74 km(46 mi) from Lake Ladoga to the Gulf of Finland, an arm of the Baltic Sea.是什么意思_A river of northwest European U.S.S.R. flowing about74 km(46 mi) from Lake Ladoga to the Gulf of Finland, an arm of the Baltic Sea.在线翻译_英语_读音_用法_例句